1) Stations charge only the install price for upgrading a reactor, not the reactor price + install price. You can get a Nova-100 for 1000 credits.
2) Stations offer to upgrade enhanced reactors to unenhanced ones.
3) Armor repair does not take into account the repair level; you can repair XMH and Neutronium armor at most stations.
4) CSCs refuse to refuel player if the rank provides free refueling.
5) CSCs no longer offer the ability to upgrade the reactor.
6) Corporate shipyards have only a refuel option, which uses only helium fuel rods.